CHANGAI Electronic Science & Technology Co., Ltd is a high-tech corporation that is specialized in studying, developing, producing and selling aluminum enclosures, electrical enclosures, electronic enclosures, industrial boxes, and instrumented case systems, high quality gas sensors, analyzers & systems in China. Headquartered in Shanghai, CHANGHAI has another fully-funded subsidiary in Chengdu, Sichuan Province. So far, CHANGHAI has extended its business scope from simple gas analyzers to gas ...